1--- 2c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al. 3SPDX-License-Identifier: curl 4Title: CURLINFO_CONTENT_LENGTH_DOWNLOAD_T 5Section: 3 6Source: libcurl 7See-also: 8 - CURLINFO_CONTENT_LENGTH_UPLOAD_T (3) 9 - curl_easy_getinfo (3) 10 - curl_easy_setopt (3) 11Protocol: 12 - HTTP 13--- 14 15# NAME 16 17CURLINFO_CONTENT_LENGTH_DOWNLOAD_T - get content-length of download 18 19# SYNOPSIS 20 21~~~c 22#include <curl/curl.h> 23 24CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_CONTENT_LENGTH_DOWNLOAD_T, 25 curl_off_t *content_length); 26~~~ 27 28# DESCRIPTION 29 30Pass a pointer to a *curl_off_t* to receive the content-length of the 31download. This is the value read from the Content-Length: field. Stores -1 if 32the size is not known. 33 34# EXAMPLE 35 36~~~c 37int main(void) 38{ 39 CURL *curl = curl_easy_init(); 40 if(curl) { 41 CURLcode res; 42 curl_easy_setopt(curl, CURLOPT_URL, "https://example.com"); 43 44 /* Perform the request */ 45 res = curl_easy_perform(curl); 46 47 if(!res) { 48 /* check the size */ 49 curl_off_t cl; 50 res = curl_easy_getinfo(curl, CURLINFO_CONTENT_LENGTH_DOWNLOAD_T, &cl); 51 if(!res) { 52 printf("Download size: %" CURL_FORMAT_CURL_OFF_T "\n", cl); 53 } 54 } 55 } 56} 57~~~ 58 59# AVAILABILITY 60 61Added in 7.55.0 62 63# RETURN VALUE 64 65Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not. 66